Tool for grasping round knobs



FIG. 1 is a perspective view of the tool for grasping round knobs;

FIG. 2 is a side view of the tool for grasping round knobs;

FIG. 3 is an end view of the left end of the design of FIG. 2; and,

FIG. 4 is an end view of the right end of the design of FIG. 2. 

The ornamental design for a tool for grasping round knobs, as shown. 